Nice job of research, Duncan. As you note, this seems to permit consensual sex between adults as long as it is kept private. I wonder, though: I don't see anything specifically stating that the adults must be different sexes, or even that there can only be two adults involved. Would a three-some violate the UCMJ? What about an orgy? Would a gay couple violate the rules if they remained private?
I found this statement particularly illuminating. I wonder if anyone has bothered to inform Congress of this little gem? As far as I can tell, politicians generally spend far more time trying to control the morality of their constituents than they do trying to control themselves.